watchdog: BUG: soft lockup - CPU#0 stuck for 112s! [syz.1.2046:14116] Modules linked in: irq event stamp: 14398585 hardirqs last enabled at (14398584): [] irqentry_exit+0x5e8/0x670 kernel/entry/common.c:219 hardirqs last disabled at (14398585): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (12325158): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (12325158): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (12325158): [] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723 softirqs last disabled at (12325161): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (12325161): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (12325161): [] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 14116 Comm: syz.1.2046 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:slab_post_alloc_hook mm/slub.c:4954 [inline] RIP: 0010:slab_alloc_node mm/slub.c:5263 [inline] RIP: 0010:kmem_cache_alloc_node_noprof+0x444/0x720 mm/slub.c:5315 Code: 66 0d 44 21 f2 0f 1f 44 00 00 0f 1f 44 00 00 44 89 e0 48 8b 74 24 28 0f b6 c8 4c 89 ff e8 64 3a 0b 00 48 89 c3 48 89 44 24 28 <48> 85 c0 0f 94 c0 41 80 f4 01 41 08 c4 75 0d 44 89 ea 48 89 df 31 RSP: 0018:ffffc900000079f8 EFLAGS: 00000282 RAX: ffff88803befd8c0 RBX: ffff88803befd8c0 RCX: 0000000000003724 RDX: 00000000fb540d11 RSI: 0000000000000001 RDI: 00000000d4cac1a2 RBP: 00000000ffffffff R08: 000000004445b98c R09: 000000004f29a8bf R10: 0000000000000012 R11: ffffffffa0201fd0 R12: ffff88802e32db01 R13: 00000000000000f0 R14: 0000000000020820 R15: ffff88801ceaca00 FS: 00007fac99a7d6c0(0000) GS:ffff888125e1f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fac99a5bf98 CR3: 0000000069a10000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __alloc_skb+0x1dc/0x3a0 net/core/skbuff.c:679 __netdev_alloc_skb+0xc1/0x850 net/core/skbuff.c:754 netdev_alloc_skb include/linux/skbuff.h:3484 [inline] dev_alloc_skb include/linux/skbuff.h:3497 [inline] __ieee80211_beacon_get+0xc06/0x1880 net/mac80211/tx.c:5654 ieee80211_beacon_get_tim+0xb4/0x2b0 net/mac80211/tx.c:5776 ieee80211_beacon_get include/net/mac80211.h:5669 [inline] mac80211_hwsim_beacon_tx+0x3c5/0x870 drivers/net/wireless/virtual/mac80211_hwsim.c:2361 __iterate_interfaces+0x2ab/0x590 net/mac80211/util.c:761 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:797 mac80211_hwsim_beacon+0xbb/0x180 drivers/net/wireless/virtual/mac80211_hwsim.c:2395 __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x51c/0xc30 kernel/time/hrtimer.c:1841 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1858 handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_schedule_irq+0x48/0xa0 kernel/sched/core.c:7190 Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 54 bf 01 00 00 00 e8 03 db 35 f6 e8 9e ee 6d f6 fb bf 01 00 00 00 c3 a9 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 24 f0 6d f6 bf 01 RSP: 0018:ffffc9000bba7098 EFLAGS: 00000206 RAX: 0000000000bc1127 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000007 RSI: ffffffff8d792148 RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff8f822377 R09: 1ffffffff1f0446e R10: dffffc0000000000 R11: fffffbfff1f0446f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:228 [inline] RIP: 0010:unwind_next_frame+0x214/0x23d0 arch/x86/kernel/unwind_orc.c:510 Code: ef 08 8b 15 7e f4 26 0c 8d 42 ff 44 39 f8 0f 86 78 04 00 00 44 89 f8 4c 8d 2c 85 00 20 c2 90 4c 89 e8 48 c1 e8 03 0f b6 04 28 <84> c0 48 89 eb 0f 85 2c 1c 00 00 45 8b 6d 00 44 89 f8 ff c0 48 8d RSP: 0018:ffffc9000bba71b8 EFLAGS: 00000a07 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000080000000 RDX: 00000000000a5d62 RSI: ffffffff8bc083c0 RDI: ffffffff8bc08380 RBP: dffffc0000000000 R08: ffffffff8173fd65 R09: ffffffff8df41aa0 R10: ffffc9000bba6f20 R11: ffffffffa0201fd0 R12: ffffffff8100012f R13: ffffffff90c22004 R14: ffffc9000bba7288 R15: 0000000000000001 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2540 [inline] slab_free mm/slub.c:6670 [inline] kfree+0x1c0/0x660 mm/slub.c:6878 free_slab_obj_exts mm/slub.c:2203 [inline] unaccount_slab mm/slub.c:3216 [inline] __free_slab+0xaf/0x180 mm/slub.c:3316 __slab_free+0x2ce/0x320 mm/slub.c:6004 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] __do_kmalloc_node mm/slub.c:5656 [inline] __kmalloc_node_noprof+0x52b/0x820 mm/slub.c:5663 kmalloc_node_noprof include/linux/slab.h:987 [inline] __vmalloc_area_node mm/vmalloc.c:3842 [inline] __vmalloc_node_range_noprof+0x5df/0x16a0 mm/vmalloc.c:4051 __vmalloc_node_noprof mm/vmalloc.c:4111 [inline] __vmalloc_noprof+0xd2/0x120 mm/vmalloc.c:4127 bpf_prog_alloc_no_stats+0x4a/0x4d0 kernel/bpf/core.c:106 bpf_prog_alloc+0x3c/0x1a0 kernel/bpf/core.c:153 bpf_prog_load+0x735/0x1a10 kernel/bpf/syscall.c:2992 __sys_bpf+0x507/0x860 kernel/bpf/syscall.c:6164 __do_sys_bpf kernel/bpf/syscall.c:6274 [inline] __se_sys_bpf kernel/bpf/syscall.c:6272 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6272 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fac98b8f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fac99a7d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fac98de6090 RCX: 00007fac98b8f749 RDX: 0000000000000094 RSI: 0000200000000140 RDI: 0000000000000005 RBP: 00007fac98c13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fac98de6128 R14: 00007fac98de6090 R15: 00007ffeae9a9a08 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 7792 Comm: kworker/u8:17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xcce/0x1260 kernel/smp.c:877 Code: 01 31 ff e8 e4 97 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 8f 93 0b 00 eb 38 f3 90 42 0f b6 04 2b 84 c0 75 11 <41> f7 04 24 01 00 00 00 74 1e e8 73 93 0b 00 eb e4 44 89 e1 80 e1 RSP: 0018:ffffc9000c40f6a0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 1ffff110170c856d RCX: ffff888024cd0000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000c40f7e0 R08: ffffffff8f822377 R09: 1ffffffff1f0446e R10: dffffc0000000000 R11: fffffbfff1f0446f R12: ffff8880b8642b68 R13: dffffc0000000000 R14: ffff8880b873bb00 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f95110dbac3 CR3: 000000000dd3a000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1043 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2711 [inline] smp_text_poke_batch_finish+0x5f9/0x1130 arch/x86/kernel/alternative.c:2921 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_disable_cpuslocked+0xc5/0x1a0 kernel/jump_label.c:240 static_key_disable+0x1a/0x20 kernel/jump_label.c:248 toggle_allocation_gate+0x1a1/0x240 mm/kfence/core.c:879 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246